101
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Gordon S, Saupe A, McBurney W, Rades T, Hook S. Comparison of chitosan nanoparticles and chitosan hydrogels for vaccine delivery. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.60.12.0004] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
In this work the potential of chitosan nanoparticles (CNP) and thermosensitive chitosan hydrogels as particulate and sustained release vaccine delivery systems was investigated. CNP and chitosan hydrogels were prepared, loaded with the model protein antigen ovalbumin (OVA) and characterised. The immunostimulatory capacity of these vaccine delivery systems was assessed in-vitro and in-vivo. Particle sizing measurements and SEM images showed that optimised OVA-loaded CNP had a size of approximately 200 nm, a polydispersity index < 0.2, and a positive zeta-potential of approximately 18 mV. The amount of OVA adsorbed onto CNP was high with an adsorption efficacy of greater than 96%. Raman spectroscopy indicated conformational changes of OVA when adsorbed onto the surface of CNP. Uptake of the dispersions and immunological activation of murine dendritic cells in-vitro could be demonstrated. Investigation of the release of fluorescently-labelled OVA (FITC-OVA) from CNP and chitosan hydrogels in-vitro showed that approximately 50% of the total protein was released from CNP within a period of ten days; release of antigen from chitosan gel occurred in a more sustained manner, with < 10% of total protein being released after 10 days. The slow release from gel formulations may be explained by the strong interactions of the protein with chitosan. While OVA-loaded CNP showed no significant immunogenicity, formulations of OVA in chitosan gel were able to stimulate both cell-mediated and humoral immunity in-vivo.
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Affiliation(s)
- Sarah Gordon
- School of Pharmacy, University of Otago, P.O. Box 913, Dunedin, New Zealand
| | - Anne Saupe
- School of Pharmacy, University of Otago, P.O. Box 913, Dunedin, New Zealand
| | - Warren McBurney
- School of Pharmacy, University of Otago, P.O. Box 913, Dunedin, New Zealand
| | - Thomas Rades
- School of Pharmacy, University of Otago, P.O. Box 913, Dunedin, New Zealand
| | - Sarah Hook
- School of Pharmacy, University of Otago, P.O. Box 913, Dunedin, New Zealand
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104
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Kaminskas LM, Kelly BD, McLeod VM, Boyd BJ, Krippner GY, Williams ED, Porter CJH. Pharmacokinetics and Tumor Disposition of PEGylated, Methotrexate Conjugated Poly-l-lysine Dendrimers. Mol Pharm 2009; 6:1190-204. [DOI: 10.1021/mp900049a] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Lisa M. Kaminskas
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville, VIC, 3052, Australia, Starpharma Holdings Ltd., Level 6, Baker Heart Research Building, Commercial Rd, Melbourne, VIC, 3004, Australia, and Centre for Cancer Research, Monash Institute of Medical Research, Monash University, 246 Clayton Rd, Clayton, VIC, 3168, Australia
| | - Brian D. Kelly
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville, VIC, 3052, Australia, Starpharma Holdings Ltd., Level 6, Baker Heart Research Building, Commercial Rd, Melbourne, VIC, 3004, Australia, and Centre for Cancer Research, Monash Institute of Medical Research, Monash University, 246 Clayton Rd, Clayton, VIC, 3168, Australia
| | - Victoria M. McLeod
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville, VIC, 3052, Australia, Starpharma Holdings Ltd., Level 6, Baker Heart Research Building, Commercial Rd, Melbourne, VIC, 3004, Australia, and Centre for Cancer Research, Monash Institute of Medical Research, Monash University, 246 Clayton Rd, Clayton, VIC, 3168, Australia
| | - Ben J. Boyd
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville, VIC, 3052, Australia, Starpharma Holdings Ltd., Level 6, Baker Heart Research Building, Commercial Rd, Melbourne, VIC, 3004, Australia, and Centre for Cancer Research, Monash Institute of Medical Research, Monash University, 246 Clayton Rd, Clayton, VIC, 3168, Australia
| | - Guy Y. Krippner
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville, VIC, 3052, Australia, Starpharma Holdings Ltd., Level 6, Baker Heart Research Building, Commercial Rd, Melbourne, VIC, 3004, Australia, and Centre for Cancer Research, Monash Institute of Medical Research, Monash University, 246 Clayton Rd, Clayton, VIC, 3168, Australia
| | - Elizabeth D. Williams
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville, VIC, 3052, Australia, Starpharma Holdings Ltd., Level 6, Baker Heart Research Building, Commercial Rd, Melbourne, VIC, 3004, Australia, and Centre for Cancer Research, Monash Institute of Medical Research, Monash University, 246 Clayton Rd, Clayton, VIC, 3168, Australia
| | - Christopher J. H. Porter
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), 381 Royal Parade, Parkville, VIC, 3052, Australia, Starpharma Holdings Ltd., Level 6, Baker Heart Research Building, Commercial Rd, Melbourne, VIC, 3004, Australia, and Centre for Cancer Research, Monash Institute of Medical Research, Monash University, 246 Clayton Rd, Clayton, VIC, 3168, Australia
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106
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Shang W, Nuffer JH, Muñiz-Papandrea VA, Colón W, Siegel RW, Dordick JS. Cytochrome C on silica nanoparticles: influence of nanoparticle size on protein structure, stability, and activity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2009; 5:470-6. [PMID: 19189325 DOI: 10.1002/smll.200800995] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The structure, thermodynamic and kinetic stability, and activity of cytochrome c (cyt c) on silica nanoparticles (SNPs) of different sizes have been studied. Adsorption of cyt c onto larger SNPs results in both greater disruption of the cyt c global structure and more significant changes of the local heme microenvironment than upon adsorption onto smaller SNPs. The disruption of the heme microenvironment leads to a more solvent-accessible protein active site, as suggested by Soret circular dichroism spectroscopy and through an increase in peroxidase activity as a function of increased SNP size. Similarly, the stability of cyt c decreases more dramatically upon adsorption onto larger SNPs. These results are consistent with changes in protein-nanoparticle interactions that depend on the size or surface curvature of the supporting nanostructure. This study provides further fundamental insights into the effects of nanoscale surfaces on adsorbed protein structure and function.
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Affiliation(s)
- Wen Shang
- Department of Materials Science and Engineering, Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
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115
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Veronese FM, Pasut G. PEGylation: Posttranslational bioengineering of protein biotherapeutics. DRUG DISCOVERY TODAY. TECHNOLOGIES 2008; 5:e57-e64. [PMID: 24981092 DOI: 10.1016/j.ddtec.2009.02.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polymer conjugation, especially by poly(ethylene glycol), has become a leading technology for the delivery of proteins. Nowadays, biotech drugs represent an increasing share of the new approved drugs, but their use is often prevented by drawbacks and safety concern. In particular, short in vivo half-life and immunogenicity are significant problems faced by the researchers dealing with the development of protein and peptide drugs. The chemical linking of a polymer to the protein surface has proved effective in prolonging protein blood circulation and reducing the immunogenicity by decreasing renal clearance and shielding immunogenic epitopes, respectively. So far, PEGylation has already led to nine marketed conjugates with great therapeutic success.:
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Affiliation(s)
- Francesco M Veronese
- Department of Pharmaceutical Sciences, University of Padua, via F. Marzolo 5, 35131 Padua, Italy.
| | - Gianfranco Pasut
- Department of Pharmaceutical Sciences, University of Padua, via F. Marzolo 5, 35131 Padua, Italy.
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